用于机动车尾气检测的NDIR传感器的加权定标方法研究

大气与环境光学学报 ›› 2016, Vol. 11 ›› Issue (6): 442-447.

• “先进环境监测技术与设备”专辑 • 上一篇下一篇

用于机动车尾气检测的NDIR传感器的加权定标方法研究

陈晨, 张玉钧, 何莹, 尤坤, 高彦伟, 刘国华

（中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室，安徽合肥 230031）

收稿日期:2016-04-14 修回日期:2016-04-18 出版日期:2016-11-28 发布日期:2016-11-30
通讯作者: 张玉钧 (1964-)，男，安徽合肥人，研究员，博导，主要从事新型环境监测技术方面的研究。 E-mail:yjzhang@aiofm.ac.cn
作者简介:陈晨 (1990-)，男，汉族，湖北武汉人，硕士，主要从事红外环境检测技术方面的研究。
基金资助:
Supported by National High Technology Research and Development Program of China(国家863计划, 2014AA06A503）, National Major Scientific Instruments and Equipment Development Project(国家重大科学仪器设备开发专项, 2012YQ22011902）

Research on Weighted Calibration Method of NDIR Sensor for Vehicle Exhaust Testing

CHEN Chen, ZHANG Yujun, HE Ying, YOU Kun, GAO Yanwei, LIU Guohua

（Key Laboratory of Environmental Optics& Technology, Anhui Institute of Optics and Fine Mechanics, the Chinese Academy of Sciences, Hefei 230031, China）

Received:2016-04-14 Revised:2016-04-18 Published:2016-11-28 Online:2016-11-30

摘要/Abstract

摘要：

非分散红外（NDIR）气体传感器是机动车尾气CO和CO2检测系统的核心部件，一般使用定标的方法来计算待测气体的浓度。针对传统定标方法生成的定标曲线在低于CO和CO2满量程10%范围内的拟合优度不能满足实际使用要求的问题，提出了一种基于最小二乘加权拟合法的定标方法，通过对低浓度点赋予更大的权重和增加定标点的数目来改善定标曲线在低浓度范围内的拟合优度。采用该方法的定标结果表明，定标曲线在整个量程范围内的定标误差均小于2%。所提出的定标方法具有较高的应用价值。

关键词: 非分散红外, 气体传感器, 定标方法, 最小二乘加权拟合

Abstract:

Nondispersive infrared (NDIR) gas sensor is the key component of vehicle exhaust testing system for CO and CO2, and the concentration of measured gas is always calculated by calibration method. The calibration curve generated by traditional calibration method can not fit very well when the gas concentration is lower than 10% of full scale and can not satisfy the measurement requirement. For this problem, a new calibration method based on weighted least square fit is presented. The method can improve the goodness of fit by giving bigger weight to data point at lower concentration and increasing the number of calibration points. The calibration result shows that the calibration curve generated by this method has relative error lower than 2% in the entire measuring scale. The calibration method presented is important in practical application.

Key words: nondispersive infrared, gas sensor, calibration method, weighted least square fit

中图分类号:

O433

陈晨张玉钧何莹尤坤高彦伟刘国华. 用于机动车尾气检测的NDIR传感器的加权定标方法研究[J]. 大气与环境光学学报, 2016, 11(6): 442-447.

CHEN Chen, ZHANG Yu-Jun, HE Ying, YOU Kun, GAO Pan-Wei, LIU Guo-Hua. Research on Weighted Calibration Method of NDIR Sensor for Vehicle Exhaust Testing[J]. Journal of Atmospheric and Environmental Optics, 2016, 11(6): 442-447.

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用于机动车尾气检测的NDIR传感器的加权定标方法研究

Research on Weighted Calibration Method of NDIR Sensor for Vehicle Exhaust Testing

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